MG is making a series of videos on the lore of PoE and Obsidian's future game, Avowed. In all honesty I haven't watched them yet or just a bit, but his videos are usually good enough
The Wheel
Adra Pillars, Soul Conduits
Animancy, the Study of Souls
Watchers
Awakenings
…
The Wheel
Adra Pillars, Soul Conduits
Animancy, the Study of Souls
Watchers
Awakenings
…